The staffs of three Fan Nation Big 12 sites provide their game predictions for Week 3 of the college football season. The Baylor Bears will open their Big 12 slate against the Iowa State Cyclones at Jack Trice Stadium in Ames, Iowa, on Saturday at 11 a.m. central. Last year’s game featured the Bears winning in Waco, Texas, but by two points, 31-29. Baylor had an 11-9 edge in the all-time series. The staff predictions for this game will be out later this week. But what about the rest of the Big 12 this weekend? Staff members from Longhorns Country,…